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C9404 (bizhub 958/808)

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Trouble typeC9404: CIS LED lighting abnormally
RankB
Trouble detection conditionAfter a scan job is completed, the machine detected that the average output of the CIS LED is greater than the specified value.
Trouble isolationScanner
Relevant electrical parts• CIS module (CIS) 
• DF power supply (DFPU) 
• Dual scan image processing board (DSIPB) 
• MFP board (MFPB)

 Procedure

  1. Correct the harness connection between CIS J101-DSIPB CN2 if faulty.
  2. Correct the harness connection between CIS J102-DFPU CN2 if faulty.
  3. Replace CIS. (Part# A782R70200)
  4. DFPU ICP1 conduction check.
  5. Replace DFPU. (Part# A3CKH00200)
  6. Replace DSIPB. (Part# A796H02A00)
  7. MFPB F3E conduction check
  8. Replace MFPB. (Part# A796H02003)

Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.

K.3.14.2 (Link to the Field Service Manual)

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